public abstract class Person {
    protected String id;
    protected String name;
    protected String address;

    public Person(String id, String name) {
        this.id = id;
        this.name = name;
    }

    public Person() {

    }

    public void showInfo() {
        System.out.println("人员信息: " + id + ", " + name);
    }

    public abstract void work();
}
